/php/db.class.php
PHP | 657 lines | 372 code | 156 blank | 129 comment | 76 complexity | a6d35ed49449bf001e9d031cd6ff819a MD5 | raw file
- <?php
- define('EZSQL_VERSION','2.03');
- define('OBJECT','OBJECT',true);
- define('ARRAY_A','ARRAY_A',true);
- define('ARRAY_N','ARRAY_N',true);
- define('EZSQL_CORE_ERROR','ezSQLcore can not be used by itself (it is designed for use by database specific modules).');
-
- $ezsql_mysql_str = array(
- 1 => 'Require $dbuser and $dbpassword to connect to a database server',
- 2 => 'Error establishing mySQL database connection. Correct user/password? Correct hostname? Database server running?',
- 3 => 'Require $dbname to select a database',
- 4 => 'mySQL database connection is not active',
- 5 => 'Unexpected error while trying to select database'
- );
- class scdb {
- public $trace = false; // same as $debug_all
- public $debug_all = false; // same as $trace
- public $debug_called = false;
- public $vardump_called = false;
- public $show_errors = true;
- public $num_queries = 0;
- public $last_query = null;
- public $last_error = null;
- public $col_info = null;
- public $captured_errors = array();
- public $cache_dir = false;
- public $cache_queries = false;
- public $cache_inserts = false;
- public $use_disk_cache = false;
- public $cache_timeout = 24; // hours
-
- public $dbuser = false;
- public $dbpassword = false;
- public $dbname = false;
- public $dbhost = false;
- // == TJH == default now needed for echo of debug function
- public $debug_echo_is_on = true;
-
- public $tables = array();
- public $table_prefix = '';
- /**********************************************************************
- * Constructor
- */
- public function scdb($dbuser='', $dbpassword='', $dbname='', $dbhost='localhost') {
- $this->__contruct($dbuser, $dbpassword, $dbname, $dbhost);
- }
-
- public function __construct($dbuser='', $dbpassword='', $dbname='', $dbhost='localhost') {
- $this->dbuser = $dbuser;
- $this->dbpassword = $dbpassword;
- $this->dbname = $dbname;
- $this->dbhost = $dbhost;
- }
- /**********************************************************************
- * Short hand way to connect to mySQL database server
- * and select a mySQL database at the same time
- */
- public function quick_connect($dbuser='', $dbpassword='', $dbname='', $dbhost='localhost') {
- $return_val = false;
- if ( ! $this->connect($dbuser, $dbpassword, $dbhost,true) ) ;
- elseif ( ! $this->select($dbname) ) ;
- else $return_val = true;
- return $return_val;
- }
- /**********************************************************************
- * Try to connect to mySQL database server
- */
- public function connect($dbuser='', $dbpassword='', $dbhost='localhost') {
- global $ezsql_mysql_str; $return_val = false;
- // Must have a user and a password
- if ( ! $dbuser ) {
- $this->register_error($ezsql_mysql_str[1].' in '.__FILE__.' on line '.__LINE__);
- $this->show_errors ? trigger_error($ezsql_mysql_str[1],E_USER_WARNING) : null;
- }
- // Try to establish the server database handle
- else if ( ! $this->dbh = @mysql_connect($dbhost,$dbuser,$dbpassword,true) ) {
- $this->register_error($ezsql_mysql_str[2].' in '.__FILE__.' on line '.__LINE__);
- $this->show_errors ? trigger_error($ezsql_mysql_str[2],E_USER_WARNING) : null;
- }
- else {
- $this->dbuser = $dbuser;
- $this->dbpassword = $dbpassword;
- $this->dbhost = $dbhost;
- $return_val = true;
- }
- return $return_val;
- }
- /**********************************************************************
- * Try to select a mySQL database
- */
- public function select($dbname='') {
- global $ezsql_mysql_str; $return_val = false;
- // Must have a database name
- if ( ! $dbname ) {
- $this->register_error($ezsql_mysql_str[3].' in '.__FILE__.' on line '.__LINE__);
- $this->show_errors ? trigger_error($ezsql_mysql_str[3],E_USER_WARNING) : null;
- }
- // Must have an active database connection
- else if ( ! $this->dbh ) {
- $this->register_error($ezsql_mysql_str[4].' in '.__FILE__.' on line '.__LINE__);
- $this->show_errors ? trigger_error($ezsql_mysql_str[4],E_USER_WARNING) : null;
- }
- // Try to connect to the database
- else if ( !@mysql_select_db($dbname,$this->dbh) ) {
- // Try to get error supplied by mysql if not use our own
- if ( !$str = @mysql_error($this->dbh))
- $str = $ezsql_mysql_str[5];
- $this->register_error($str.' in '.__FILE__.' on line '.__LINE__);
- $this->show_errors ? trigger_error($str,E_USER_WARNING) : null;
- }
- else {
- $this->dbname = $dbname;
- $return_val = true;
- }
- return $return_val;
- }
-
- public function set_table_prefix($prefix) {
- if( $prefix && strlen($prefix) > 0 ) {
- if ( preg_match('|[^a-z0-9_]|i', $prefix) )
- die('Invalid database prefix');
- }
- else $prefix = '';
- $old_prefix = $this->table_prefix;
- $this->table_prefix = $prefix;
- $this->set_tables($this->tables);
- return $old_prefix;
- }
-
- public function set_tables($tables) {
- if(!is_array($tables)) {
- die('$scdb->set_tables() should be called with an array of table names!');
- }
- $this->tables = $tables;
- foreach($this->tables as $table) {
- $this->$table = $this->table_prefix . $table;
- }
- }
- /**********************************************************************
- * Format a mySQL string correctly for safe mySQL insert
- * (no mater if magic quotes are on or not)
- */
- public function escape($str) {
- return mysql_escape_string(stripslashes($str));
- }
- /**********************************************************************
- * Return mySQL specific system date syntax
- * i.e. Oracle: SYSDATE Mysql: NOW()
- */
- public function sysdate() {
- return 'NOW()';
- }
- /**********************************************************************
- * Perform mySQL query and try to detirmin result value
- */
- public function query($query) {
- // Initialise return
- $return_val = 0;
- // Flush cached values..
- $this->flush();
- // For reg expressions
- $query = trim($query);
- // Log how the function was called
- $this->func_call = "\$db->query(\"$query\")";
- // Keep track of the last query for debug..
- $this->last_query = $query;
- // Count how many queries there have been
- $this->num_queries++;
- // Use core file cache function
- if ( $cache = $this->get_cache($query) ) {
- return $cache;
- }
- // If there is no existing database connection then try to connect
- if ( ! isset($this->dbh) || ! $this->dbh ) {
- $this->connect($this->dbuser, $this->dbpassword, $this->dbhost);
- $this->select($this->dbname);
- }
- // Perform the query via std mysql_query function..
- $this->result = @mysql_query($query,$this->dbh);
- // If there is an error then take note of it..
- if ( $str = @mysql_error($this->dbh) ) {
- $is_insert = true;
- $this->register_error($str);
- $this->show_errors ? trigger_error($str,E_USER_WARNING) : null;
- return false;
- }
- // Query was an insert, delete, update, replace
- $is_insert = false;
- if ( preg_match("/^(insert|delete|update|replace)\s+/i",$query) ) {
- $this->rows_affected = @mysql_affected_rows();
- // Take note of the insert_id
- if ( preg_match("/^(insert|replace)\s+/i",$query) ) {
- $this->insert_id = @mysql_insert_id($this->dbh);
- }
- // Return number of rows affected
- $return_val = $this->rows_affected;
- }
- // Query was a select
- else {
- // Take note of column info
- $i=0;
- while ($i < @mysql_num_fields($this->result)) {
- $this->col_info[$i] = @mysql_fetch_field($this->result);
- $i++;
- }
- // Store Query Results
- $num_rows=0;
- while ( $row = @mysql_fetch_object($this->result) ) {
- // Store relults as an objects within main array
- $this->last_result[$num_rows] = $row;
- $num_rows++;
- }
- @mysql_free_result($this->result);
- // Log number of rows the query returned
- $this->num_rows = $num_rows;
- // Return number of rows selected
- $return_val = $this->num_rows;
- }
- // disk caching of queries
- $this->store_cache($query,$is_insert);
- // If debug ALL queries
- $this->trace || $this->debug_all ? $this->debug() : null ;
- return $return_val;
- }
- /**********************************************************************
- * Print SQL/DB error - over-ridden by specific DB class
- */
- public function register_error($err_str) {
- // Keep track of last error
- $this->last_error = $err_str;
- // Capture all errors to an error array no matter what happens
- $this->captured_errors[] = array(
- 'error_str' => $err_str,
- 'query' => $this->last_query);
- }
- /**********************************************************************
- * Turn error handling on or off..
- */
- public function show_errors() {
- $this->show_errors = true;
- }
- public function hide_errors() {
- $this->show_errors = false;
- }
- /**********************************************************************
- * Kill cached query results
- */
- public function flush() {
- // Get rid of these
- $this->last_result = null;
- $this->col_info = null;
- $this->last_query = null;
- $this->from_disk_cache = false;
- }
- /**********************************************************************
- * Get one variable from the DB - see docs for more detail
- */
- public function get_var($query=null,$x=0,$y=0) {
- // Log how the function was called
- $this->func_call = "\$db->get_var(\"$query\",$x,$y)";
- // If there is a query then perform it if not then use cached results..
- if ( $query ) {
- $this->query($query);
- }
- // Extract var out of cached results based x,y vals
- if ( $this->last_result[$y] ) {
- $values = array_values(get_object_vars($this->last_result[$y]));
- }
- // If there is a value return it else return null
- return (isset($values[$x]) && $values[$x]!=='')?$values[$x]:null;
- }
- /**********************************************************************
- * Get one row from the DB - see docs for more detail
- */
- public function get_row($query=null,$output=OBJECT,$y=0) {
- // Log how the function was called
- $this->func_call = "\$db->get_row(\"$query\",$output,$y)";
- // If there is a query then perform it if not then use cached results..
- if ( $query ) {
- $this->query($query);
- }
- // If the output is an object then return object using the row offset..
- if ( $output == OBJECT ) {
- return $this->last_result[$y]?$this->last_result[$y]:null;
- }
- // If the output is an associative array then return row as such..
- elseif ( $output == ARRAY_A ) {
- return $this->last_result[$y]?get_object_vars($this->last_result[$y]):null;
- }
- // If the output is an numerical array then return row as such..
- elseif ( $output == ARRAY_N ) {
- return $this->last_result[$y]?array_values(get_object_vars($this->last_result[$y])):null;
- }
- // If invalid output type was specified..
- else {
- $this->print_error(" \$db->get_row(string query, output type, int offset) -- Output type must be one of: OBJECT, ARRAY_A, ARRAY_N");
- }
- }
- /**********************************************************************
- * Function to get 1 column from the cached result set based in X index
- * see docs for usage and info
- */
- public function get_col($query=null,$x=0) {
- // If there is a query then perform it if not then use cached results..
- if ( $query ) {
- $this->query($query);
- }
- // Extract the column values
- for ( $i=0; $i < count($this->last_result); $i++ ) {
- $new_array[$i] = $this->get_var(null,$x,$i);
- }
- return $new_array;
- }
- /**********************************************************************
- * Return the the query as a result set - see docs for more details
- */
- public function get_results($query=null, $output = OBJECT) {
- // Log how the function was called
- $this->func_call = "\$db->get_results(\"$query\", $output)";
- // If there is a query then perform it if not then use cached results..
- if ( $query ) {
- $this->query($query);
- }
- // Send back array of objects. Each row is an object
- if ( $output == OBJECT ) {
- return $this->last_result;
- }
- elseif ( $output == ARRAY_A || $output == ARRAY_N ) {
- if ( $this->last_result ) {
- $i=0;
- foreach( $this->last_result as $row ) {
- $new_array[$i] = get_object_vars($row);
- if ( $output == ARRAY_N ) {
- $new_array[$i] = array_values($new_array[$i]);
- }
- $i++;
- }
- return $new_array;
- }
- else {
- return null;
- }
- }
- }
- /**********************************************************************
- * Function to get column meta data info pertaining to the last query
- * see docs for more info and usage
- */
- public function get_col_info($info_type="name",$col_offset=-1) {
- if ( $this->col_info ) {
- if ( $col_offset == -1 ) {
- $i=0;
- foreach($this->col_info as $col ) {
- $new_array[$i] = $col->{$info_type};
- $i++;
- }
- return $new_array;
- }
- else {
- return $this->col_info[$col_offset]->{$info_type};
- }
- }
- }
- /**********************************************************************
- * store_cache
- */
- public function store_cache($query,$is_insert) {
- // The would be cache file for this query
- $cache_file = $this->cache_dir.'/'.md5($query).'.sql.php';
- // disk caching of queries
- if ( $this->use_disk_cache && ( $this->cache_queries && ! $is_insert ) || ( $this->cache_inserts && $is_insert )) {
- if ( ! is_dir($this->cache_dir) ) {
- $this->register_error("Could not open cache dir: $this->cache_dir");
- $this->show_errors ? trigger_error("Could not open cache dir: $this->cache_dir",E_USER_WARNING) : null;
- }
- else {
- // Cache all result values
- $result_cache = array(
- 'col_info' => $this->col_info,
- 'last_result' => $this->last_result,
- 'num_rows' => $this->num_rows,
- 'return_value' => $this->num_rows);
- error_log ( serialize($result_cache), 3, $cache_file);
- }
- }
- }
- /**********************************************************************
- * get_cache
- */
- public function get_cache($query) {
- // The would be cache file for this query
- $cache_file = $this->cache_dir.'/'.md5($query).'.sql.php';
- // Try to get previously cached version
- if ( $this->use_disk_cache && file_exists($cache_file) ) {
- // Only use this cache file if less than 'cache_timeout' (hours)
- if ( (time() - filemtime($cache_file)) > ($this->cache_timeout*3600) ) {
- unlink($cache_file);
- }
- else {
- $result_cache = unserialize(file_get_contents($cache_file));
- $this->col_info = $result_cache['col_info'];
- $this->last_result = $result_cache['last_result'];
- $this->num_rows = $result_cache['num_rows'];
- $this->from_disk_cache = true;
- // If debug ALL queries
- $this->trace || $this->debug_all ? $this->debug() : null ;
- return $result_cache['return_value'];
- }
- }
- }
- /**********************************************************************
- * Dumps the contents of any input variable to screen in a nicely
- * formatted and easy to understand way - any type: Object, Var or Array
- */
- public function vardump($mixed='') {
- // Start outup buffering
- ob_start();
- echo "<p><table><tr><td bgcolor=ffffff><blockquote><font color=000090>";
- echo "<pre><font face=arial>";
- if ( ! $this->vardump_called ) {
- echo "<font color=800080><b>ezSQL</b> (v",EZSQL_VERSION,") <b>Variable Dump..</b></font>\n\n";
- }
- $var_type = gettype ($mixed);
- print_r(($mixed?$mixed:"<font color=red>No Value / False</font>"));
- echo "\n\n<b>Type:</b> ",ucfirst($var_type),"\n";
- echo "<b>Last Query</b> [",$this->num_queries,"]<b>:</b> ",($this->last_query?$this->last_query:"NULL"),"\n";
- echo "<b>Last Function Call:</b> ",($this->func_call?$this->func_call:"None"),"\n";
- echo "<b>Last Rows Returned:</b> ",count($this->last_result),"\n";
- echo "</font></pre></font></blockquote></td></tr></table>";
- echo "\n<hr size=1 noshade color=dddddd>";
- // Stop output buffering and capture debug HTML
- $html = ob_get_contents();
- ob_end_clean();
- // Only echo output if it is turned on
- if ( $this->debug_echo_is_on ) {
- echo $html;
- }
- $this->vardump_called = true;
- return $html;
- }
- /**********************************************************************
- * Displays the last query string that was sent to the database & a
- * table listing results (if there were any).
- * (abstracted into a seperate file to save server overhead).
- */
- public function debug() {
- // Start outup buffering
- ob_start();
- echo "<blockquote>";
- // Only show ezSQL credits once..
- if ( ! $this->debug_called ) {
- echo "<font color=800080 face=arial size=2><b>ezSQL</b> (v",EZSQL_VERSION,") <b>Debug..</b></font><p>\n";
- }
- if ( $this->last_error ) {
- echo "<font face=arial size=2 color=000099><b>Last Error --</b> [<font color=000000><b>",$this->last_error,"</b></font>]<p>";
- }
- if ( $this->from_disk_cache ) {
- echo "<font face=arial size=2 color=000099><b>Results retrieved from disk cache</b></font><p>";
- }
- echo "<font face=arial size=2 color=000099><b>Query</b> [$this->num_queries] <b>--</b> ";
- echo "[<font color=000000><b>$this->last_query</b></font>]</font><p>";
- echo "<font face=arial size=2 color=000099><b>Query Result..</b></font>";
- echo "<blockquote>";
- if ( $this->col_info ) {
- // =====================================================
- // Results top rows
- echo "<table cellpadding=5 cellspacing=1 bgcolor=555555>";
- echo "<tr bgcolor=eeeeee><td nowrap valign=bottom><font color=555599 face=arial size=2><b>(row)</b></font></td>";
- for ( $i=0; $i < count($this->col_info); $i++ ) {
- echo "<td nowrap align=left valign=top><font size=1 color=555599 face=arial>{$this->col_info[$i]->type} {$this->col_info[$i]->max_length}</font><br><span style='font-family: arial; font-size: 10pt; font-weight: bold;'>{$this->col_info[$i]->name}</span></td>";
- }
- echo "</tr>";
- // ======================================================
- // print main results
- if ( $this->last_result ) {
- $i=0;
- foreach ( $this->get_results(null,ARRAY_N) as $one_row ) {
- $i++;
- echo "<tr bgcolor=ffffff><td bgcolor=eeeeee nowrap align=middle><font size=2 color=555599 face=arial>$i</font></td>";
- foreach ( $one_row as $item ) {
- echo "<td nowrap><font face=arial size=2>$item</font></td>";
- }
- echo "</tr>";
- }
- } // if last result
- else {
- echo "<tr bgcolor=ffffff><td colspan=",(count($this->col_info)+1),"><font face=arial size=2>No Results</font></td></tr>";
- }
- echo "</table>";
- } // if col_info
- else {
- echo "<font face=arial size=2>No Results</font>";
- }
- echo "</blockquote></blockquote><hr noshade color=dddddd size=1>";
- // Stop output buffering and capture debug HTML
- $html = ob_get_contents();
- ob_end_clean();
- // Only echo output if it is turned on
- if ( $this->debug_echo_is_on ) {
- echo $html;
- }
- $this->debug_called = true;
- return $html;
- }
- }
- $scdb = new scdb(DB_USER, DB_PASS, DB_NAME, DB_HOST);
- ?>